Thank you ADS! After the v8.5.4 update, I'm also seeing a good speed increase in RenderZone now with OSX and 12 cores selected.

Before:

v6

12 cpu - 00:11:47

24 cpu - 00:12:11

v7

12 cpu - 00:11:59

24 cpu - 00:11:28

RenderZone v8.5.3 results:

4 cpu - 00:31:19

6 cpu - 00:21:20

8 cpu - 00:28:08

12 cpu-00:35:23

24 cpu-01:04:04

After - v8.5.4 results:

12 cpu- 9:56

24 cpu- 10:15

Conclusion - More than DOUBLE the rendering speed of v8.5.3, and a solid 20% increase from v6 and v7. Hyperthreading is still not really helping, but I suspect that has to do with OSX's handling of it rather than RenderZone. This is on 10.10.5 Yosemite, have been waiting to upgrade to El Capitan. Should I upgrade now? I know the new MacOS is going to take quite some time to be ready for a working environment.

Ok, thanks for the updated numbers. It looks like this may be the case only when using the 12 core X Hyperthread = 24 core situation, and in that case you are right that you can save a few seconds by limiting it in this case.

Thanks again for bringing this to our attention, we will see what we can do to improve this.